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Spin-Dependent Fano Factor in FM/DNA/FM Molecular Junction

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Abstract

Based on a tight-binding model and a generalized Green’s function method in the Landauer−Büttiker formalism, the current-voltage characteristics, the noise power resulting of the spin-dependent current fluctuations and Fano factor of poly(G)-poly(C) DNA molecule sandwiched between ferromagnetic three-dimensional electrodes (FM/DNA/FM) are numerically investigated. It is found when the bias voltage increased, the current and noise power increase and the Fano factor decreases. Our results show the spin-dependent transport properties are significantly influenced by the electrode/molecule coupling strength so that the reinforcement of the electrode/molecule coupling strength give rise to increasing of the current and noise power so that the Fano factor decreased.

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Authors and Affiliations

  1. Department of Physics, Sari Branch, Islamic Azad University, Sari, Iran

    A. Ahmadi Fouladi

  2. School of Physics, Damghan University, Damghan, Iran

    S. A. Ketabi

Authors
  1. A. Ahmadi Fouladi
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  2. S. A. Ketabi
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Correspondence to A. Ahmadi Fouladi.

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Ahmadi Fouladi, A., Ketabi, S.A. Spin-Dependent Fano Factor in FM/DNA/FM Molecular Junction. J Supercond Nov Magn 26, 469–475 (2013). https://doi.org/10.1007/s10948-012-1768-x

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  • DOI: https://doi.org/10.1007/s10948-012-1768-x

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